mpich - 4.2.1-4 main

MPICH is a high-performance and widely portable implementation of the
MPI-4.1 standard from the Argonne National Laboratory.
It efficiently supports different computation and communication platforms
including commodity clusters, SMPs, massively parallel systems, and
high-speed networks.
This release has all MPI 4.1 functions and features required by the standard
with the exception of support for the "external32" portable I/O format and
user-defined data representations for I/O.
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This package includes the program binaries necessary to run MPICH programs.